Chuck



D. N. FINLAYSON.

CHUCK.

APPLICATION FILED MAH. 26. 1920.

Patented Aug. 8, 11922.

//////////lf/ Y amante: .Do/7 /V. Fn/ayso/ anonima @dal met

DON N. FINLAYSONVF FLAT ROCK, lVICI-IGAN, ASSGNOR T0 DETROT lNEUl/.ATIC CHUCK CMPANY, UF FLAT BUCK, lVlGHGAlQ', A @GRECE-ACCION 0F MCHGAN.

CHUCK.

MHS Trient- Patented Aug. 8, l922.

Application led flarch 56, 1920. Serial No. 369,124.

'To all lw/'Lom t may concern.'

lle it known that l, DoN'll. FrNLA-rson, a citizen or the United States of America, residing at Flat Rock, in the county of lVayne and State ot lichigan, have invented certain new and useful Improvements in Chucks, of which the Yfollowing is a specilication, reference being had therein to the accompanying drawings.

The invention relates to pneumatically operated chucks, particularly designed for use on drill presses and similar machines. lt is the object of the invention to provide a unit in which the operating motor is rigidly attached to the chuck, but is arranged so as not to interfere with the work, and .it is the further object to provide l'or the removal ot the chips formed by the machining ot the work while held in the chuck. These and other objects in view, the invention comprises the construction as hereinafter set i'orth.

In the drawings:

Figure l is a vertical central section through the chuck and operating motor;

Figure 2 is a detailed sectional view taken on the line 2 2 of Figure l.

A is the work-holding chuck which is of a construction leaving a relatively large central opening B into which portions of the work may extend when clamped and held by the chuck. C are the clamping jaws which are operated radially by racks l) actuated by gear segments E integral with Oear segments F which engage racks (l on a central longitudinally movable sleeve H which is reciprocable on a shield or bushing ll extending inwardly from an opening in the 'face oli the body oit the chuck. The sleeve ll. is of a diameter to provide a relatively large central recess so that in clamping the work, as 'for instance, a wheel hub, a portion of the blank can extend inward within the sleeve. The jaws each have an overhanging portion that extends past the outer end of the shield H, to grip the work, this portion, not being shown, and a general construction ot' the jaw is disclosed fully in my cepending application for chucks Serial 353,528 iiled January 23rd, 1920.

To actuate the jaws of the chuck it is necessary to move the sleeve H longitudinally and by means which will not interfere with the work within the recess, or even with any portion of the work which may Yoi the following construction:

l is tubular member secured at its upper end to 'the sleeve H by suitable means, such a threaded engagement therewith. lt is so disposed 'that the inner end is as close to the bushing or shield H as possible to still permit its reciprocation so that' it in effect is an unbroken continuation of the shield. l is a `tubular member of greater diameter surrounding the member l and secured at its upper end to the base l of the chuck, which latter may be mountedA upon a table or other support (not shown). it the lower end or' the tube J is mounted a pneu: matic motor li. including an outer cylinder andA a piston L therein. This piston is connected with the inner tube l, preferably by means of the central shank M, passing` through a suitable packing tached at its upper end to a head threaded r otherwise secured to the member l. The head 0 is preferably formed with a conical upper end P, so that any chips falling through the tubes will be deflected outward by the cone. rlhe tubes l and d are also provided on opposite sides with cut-away portions or slots Q so that the chips which arev outwardly deflected will pass through these slots and out from the tubes.

W ith the construction described when the device is mounted upon. the table or the drill press, the tubes l and J will extend downward beneath the table and the motor K will be suspended from their lower ends.

The motor is controlled by a suitable air valve (not shown), which alternately admits air above and below the piston L. Thus when the air is admitted above the pis ton, it will exert a downward pull upon the tube l, which is communicated. to the sleeve lil and racks (l thereon, these in turn actuating the gear segments F which through the segments E move the racks D radially inward. rllhe clamping jaws will thus en gage the portion of the work opposite the same, while the hollow sleeve H and tubes l and J will provide clearance for any portion of the work, such for instance as a shaft, which is below the portion gripped by the chuck jaws. When, during the machining or drilling operations, chips are formed, these will drop downward through the tube l and upon striking the conical dellector P will be forced outward throughv lforming an extension of the central aperture therein, a motor mounted on the opposite end of said tube, an inner tube connected' at oneend to the actuating member of said motor and at itsopposite end'to said longitudinally movable sleeve, and a deflector within said inner tube ttor directing the' chips outward through registering apertures in said inner and outer tubes.

f 2. The combination with a chuck having an annular wall extending inwardly 'from the face of the chuck and radially movable jaws, o'li a longitudinally movable sleeve telescoping over the wall tor operating'said aws, a tube rigidly connected to said chuck forming an extension of the wall bore, a motor mounted at the opposite end or said ftube, an inner tube connected at one end to the actuating member of said motor and at its opposite end to said longitudinally movable sleeve, and a conical head within said inner tube, said tubes being slotted to pro- Laar-,eee

vide registering apertures through which chips deflected by said conical head are forced outward therefrom.

3. The combination with a chuck having a Sleeved central opening therethrough, a m0- tor having a reciprocatory piston and a tubular member securing the chuck and motorl together with opening and piston in substantially aligned relation, of a tubular connection between lthe piston and the chuck jaws in` internal sliding engagement with the tubular member and external tele- Scoping engagement with the sleeve of the chuck opening, the tubular connection and vmember having side delivery openings in register.

l. The combination with a chuck having a sleeve extending from the chuck face into an opening through the chuck, a jaw'operating member telescoping over the sleeve, a motor having a reciprocable pistonk and a tubular member rigidly connecting the chuck and motor and housing the pieton, ot a tubular member sliding in the Aconnecting member and connecting the piston and the jaw operating member and means 'forming the connection between the tubular member and piston adapted to deflect material enter- DON N. FNLAYSON.

Vse 

